cosecant
noun
co·se·cant
| \ (ˌ)kō-ˈsē-ˌkant
, -kənt\
, -kənt\
Definition of cosecant
1
: a trigonometric function that for an acute angle is the ratio between the hypotenuse of a right triangle of which the angle is considered part and the leg opposite the angle
2
: a trigonometric function csc θ that is the reciprocal of the sine for all real numbers θ for which the sine is not zero and that is exactly equal to the cosecant of an angle of measure θ in radians
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